My Inquiry
My Account
Texas Instruments LM3S1165-EQC50-A2T
- Part No.:
- LM3S1165-EQC50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S1165-EQC50-A2T.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,712
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM3S1165-EQC50-A2T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 64 KB SRAM, integrated hibernation module, 8-channel 12-bit ADC, and dual UARTs. It operates at 50 MHz, supports real-time clock wake-up from hibernate, and targets embedded control in industrial monitoring and motor drive systems.
For engineers reviewing the LM3S1165-EQC50-A2T datasheet, LM3S1165-EQC50-A2T pinout, LM3S1165-EQC50-A2T application, or LM3S1165-EQC50-A2T equivalent, key selection criteria include hibernation current (2 µA), RTC-backed battery memory, 50 MHz CPU clock, and integrated analog peripherals for sensor interfacing without external signal conditioning.
Technical Context
The LM3S1165-EQC50-A2T implements the ARM Cortex-M3 core with NVIC, SysTick, and MPU-enabling deterministic interrupt latency and memory protection. It integrates a dedicated hibernation module with battery-backed RAM, RTC, and wake-up capability via GPIO or RTC match.
Peripherals include an 8-channel 12-bit ADC with hardware averaging, two UARTs supporting IrDA/SIR, one I²C master/slave, one SSI, and a PWM module with fault protection. Clocking is managed by internal PLL and multiple gated system clocks routed to individual peripherals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, Thumb-2 instruction set - enables efficient C/C++ code execution and low-cycle ISR handling. |
| Max Clock Speed | 50 MHz - determines real-time loop performance and peripheral throughput limits for time-critical control tasks. |
| Flash / SRAM | 256 KB flash / 64 KB SRAM - supports complex firmware with bootloader, communication stacks, and data logging buffers. |
| Hibernate Current | 2 µA typical - allows multi-year operation on coin-cell batteries in remote sensor nodes or maintenance-free field devices. |
| ADC Resolution | 12-bit, 8-channel, up to 1 MSPS - provides sufficient dynamic range for precision temperature, pressure, and current sensing. |
| UART Interfaces | 2 × UART with FIFO, IrDA, and SIR support - enables robust serial diagnostics, host connectivity, and infrared remote interface. |
| I²C & SSI | 1 × I²C (master/slave), 1 × SSI (SPI-compatible) - permits direct connection to EEPROMs, sensors, displays, and digital potentiometers. |
Pinout & Package
LM3S1165-EQC50-A2T is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined per TI SPMS014I datasheet Section 5.1 and Table 5-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD / VDDA / VDDC | Power supply inputs | Digital (VDD), analog (VDDA), and core (VDDC) rails - require separate filtering to minimize noise coupling into ADC and PLL. |
| GND / GNDA / GNDC | Ground returns | Analog ground (GNDA) must be star-connected near ADC reference to preserve 12-bit linearity. |
| PD0–PD7 | GPIO Port D | Configurable as UART0/1 I/O, SSI0, I²C0, or general-purpose - enables flexible peripheral mapping without PCB redesign. |
| PH0–PH3 | Hibernate module I/O | HIBRST#, HIBACK, HIBRTCA, HIBRTCD - control hibernation entry/exit and RTC alarm signaling. |
| PA0–PA7 | ADC input channels | Direct connection to 8-channel 12-bit ADC - eliminates need for external multiplexers in multi-sensor systems. |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation Module with RTC | Retains 2 KB SRAM and RTC state at 2 µA - enables ultra-low-power sleep mode with precise wake-up timing for periodic sensor sampling. |
| Battery-Backed Memory | 2 KB of hibernation RAM powered by VBAT - preserves calibration data, event logs, and configuration across main power loss. |
| Integrated Analog Peripherals | 8-channel 12-bit ADC + analog comparator + internal temperature sensor - reduces BOM count and layout area for condition-monitoring applications. |
| Dual UART with IrDA Support | Two independent UARTs with SIR encoder/decoder and 16-byte FIFO - simplifies firmware update over infrared and diagnostic logging via RS-232 adapters. |
| ARM Cortex-M3 Core | Hardware divide, single-cycle MAC, NVIC with 32 priority levels - delivers deterministic response for motor control loops and safety-critical interrupts. |
Applications
| Industrial Sensor Node | Motor Control Interface |
|---|---|
Use Scenario: Remote environmental monitoring unit powered by lithium thionyl chloride battery with 10-year life target. IC Role / Device Role / Timing Role: Main controller managing ADC sampling, RTC-triggered wake-up, data compression, and UART-based telemetry upload. Use Value: 2 µA hibernate current and battery-backed RAM eliminate external nonvolatile storage and extend operational lifetime without maintenance. | Use Scenario: Brushless DC motor driver with Hall-effect feedback, current sensing, and closed-loop speed regulation. IC Role / Device Role / Timing Role: Real-time control unit executing FOC algorithms, generating PWM signals, and monitoring overcurrent/fault conditions. Use Value: Deterministic 50 MHz Cortex-M3 execution and hardware PWM fault protection enable safe, responsive motor commutation. |
| Smart Energy Meter | Building Automation Controller |
Use Scenario: DIN-rail mounted electricity meter with tamper detection, pulse counting, and optical port communication. IC Role / Device Role / Timing Role: System-on-chip handling metrology interface, LCD driving, IR communication, and secure firmware updates. Use Value: Integrated UART + I²C + SSI interfaces reduce external level shifters and simplify compliance with DLMS/COSEM protocol stacks. | Use Scenario: HVAC zone controller collecting temperature/humidity data, driving relays/valves, and communicating via Modbus RTU over RS-485. IC Role / Device Role / Timing Role: Central processing node managing sensor fusion, PID control, and serial gateway functionality. Use Value: Dual UARTs allow simultaneous local debug (UART0) and field bus communication (UART1), while hibernation extends battery backup during AC failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Tiva C TM4C123GH6PM | Successor part with 80 MHz Cortex-M4F, floating-point unit, enhanced PWM, and USB OTG - no hibernation module; higher active current. | Requires redesign for USB host/device roles and DSP-intensive filtering; not drop-in for battery-powered hibernate use cases. | Select when floating-point math, USB connectivity, or higher CPU throughput outweighs ultra-low-power hibernation needs. |
| STM32F103VET6 | ARM Cortex-M3 at 72 MHz, 512 KB flash, 64 KB SRAM, but lacks dedicated hibernation module and battery-backed RAM. | Supports similar motor control and sensor interface roles, yet requires external RTC and backup power management circuitry. | Choose for cost-sensitive designs where external RTC integration is acceptable and hibernation current <5 µA is not mandatory. |
Compared with TM4C123GH6PM and STM32F103VET6, the LM3S1165-EQC50-A2T uniquely delivers sub-5 µA hibernation with integrated RTC and battery-backed memory - making it irreplaceable in maintenance-free, long-life battery applications where system-level power budget is constrained to nanoampere averages.
Availability
LM3S1165-EQC50-A2T is available at Aetrix Electronics and suitable for industrial sensor nodes, motor control interfaces, smart energy meters, and building automation controllers requiring stable component supply and long-term lifecycle support.
Supply support for LM3S1165-EQC50-A2T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog, embedded processing, and wireless technologies for industrial, automotive, and consumer markets.
The Stellaris LM3S series was designed specifically for cost-sensitive, low-power embedded control applications requiring integrated analog peripherals, deterministic real-time performance, and extended battery life - preceding the Tiva C family.
FAQ
What is the maximum operating frequency of the LM3S1165-EQC50-A2T?
The LM3S1165-EQC50-A2T operates at a maximum CPU clock frequency of 50 MHz, achieved using its internal PLL with external crystal or oscillator input. This speed is confirmed in the Electrical Characteristics section of the SPMS014I datasheet and defines the upper bound for instruction throughput, timer resolution, and peripheral data rates in the LM3S1165-EQC50-A2T.
Does the LM3S1165-EQC50-A2T support hibernation with battery backup?
Yes, the LM3S1165-EQC50-A2T includes a dedicated hibernation module that retains 2 KB of SRAM and RTC state when powered from VBAT, drawing only 2 µA typical. This feature is documented in Section 6 of the SPMS014I datasheet and enables maintenance-free operation in battery-powered applications - a defining capability of the LM3S1165-EQC50-A2T.
How many ADC channels does the LM3S1165-EQC50-A2T have, and what is their resolution?
The LM3S1165-EQC50-A2T integrates an 8-channel, 12-bit successive-approximation ADC with hardware sample averaging and internal temperature sensor. Channel mapping and timing specifications are detailed in Section 11 of the SPMS014I datasheet - confirming full 12-bit ENOB performance across all eight inputs in the LM3S1165-EQC50-A2T.
Is the LM3S1165-EQC50-A2T pin-compatible with other Stellaris LM3S devices?
No, the LM3S1165-EQC50-A2T uses a 100-pin LQFP package with a unique pinout defined in Table 5-1 of SPMS014I. While other LM3S devices share the Cortex-M3 architecture, pin assignments for peripherals like UART, SSI, and ADC differ across variants - meaning the LM3S1165-EQC50-A2T requires its own PCB layout and cannot be substituted without hardware revision.
What debug interface does the LM3S1165-EQC50-A2T support?
The LM3S1165-EQC50-A2T supports JTAG debugging via dedicated TCK, TMS, TDI, TDO, and nTRST pins, as specified in Section 4 of the SPMS014I datasheet. It also supports SWD (Serial Wire Debug) through the same physical interface, enabling compatibility with standard ARM debug probes - a core capability retained across the LM3S1165-EQC50-A2T's entire production lifecycle.
LM3S1165-EQC50-A2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 1000
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- I2C, IrDA, Microwire, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 43
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 16K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.25V ~ 2.75V
- Data Converters:
- A/D 4x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S1165-EQC50-A2T FAQ
1.How can I place an order for LM3S1165-EQC50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S1165-EQC50-A2T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM3S1165-EQC50-A2T reliable?
The price and inventory of LM3S1165-EQC50-A2T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S1165-EQC50-A2T is usually 5 days.
3.What payment methods are accepted for LM3S1165-EQC50-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S1165-EQC50-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S1165-EQC50-A2T?
LM3S1165-EQC50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S1165-EQC50-A2T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM3S1165-EQC50-A2T?
For technical support, including LM3S1165-EQC50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S1165-EQC50-A2T requirements.
6.How does Aetrix verify that LM3S1165-EQC50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S1165-EQC50-A2T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM3S1165-EQC50-A2T meets industry standards.
7.What is the process for return or replacement of LM3S1165-EQC50-A2T?
All LM3S1165-EQC50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S1165-EQC50-A2T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM3S1165-EQC50-A2T part is unused and in its original packaging.
Return procedure for LM3S1165-EQC50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM3S1165-EQC50-A2T Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
